- Does MetalWorks have a course of dealing entitling it to payment for the 500 extra bolts?
Answer: No, because BuildRight's repeated written objections show there was no common basis of understanding that overshipments were acceptable.
Whenever you see prior transactions between the same parties, think "course of dealing" under the UCC: a sequence of conduct that is reasonably construed as a common basis of understanding. The key word is *common*—both sides must share the understanding. Here, BuildRight paid each overshipment but simultaneously sent written objections saying it would not accept or pay for future excess. That means there was never a mutual agreement that overshipments were acceptable; BuildRight's payments were made under protest, not as assent. So the correct answer is No, because BuildRight's repeated written objections show there was no common basis of understanding that overshipments were acceptable.
The parol evidence rule does not bar this result: the UCC explicitly allows evidence of course of dealing, course of performance, and usage of trade to explain or supplement a written contract, even a final one. The trap in that choice is treating the rule as a blanket exclusion. BuildRight's payment of the three prior invoices also fails because it ignores the contemporaneous objections—conduct plus objection cannot create a shared understanding. And the parties' repeated transactions over three years is not a "usage of trade," which is an industry-wide practice, not a bilateral history; moreover, the objections defeat any trade usage inference.
Study tip: when a party pays but objects in writing, ask "was there a meeting of the minds?" Payment without protest may create a course of dealing; payment plus protest does not.
- How should the trial court rule on the admissibility and allocation of the proof?
Answer: The jury decides whether the code is regularly observed in the trade, but the court decides the meaning of the code's text.
When you see a question involving a trade code or usage of trade, remember the judge-jury split: the existence and scope of a usage of trade are questions of fact for the jury, but the interpretation of a written document's text is a question of law for the court. Here, the expert testifies that the grading code is "regularly observed" in the trade (a factual claim about industry practice) and that the syrup meets the code's standard (an interpretive claim about the code's text). Therefore, the jury must decide whether the code is regularly observed, while the court decides the meaning of the code's text—which is exactly what the correct answer states.
The choice that says the jury decides both the regularity and the code's meaning is wrong because it improperly treats the interpretation of a written text as a pure fact question. The choice that says the court decides both issues is wrong because it ignores that the regularity of a practice is an empirical, factual matter for the jury. Finally, the choice that would exclude the expert's testimony because the "code itself is the best evidence" misapplies the best evidence rule—that rule concerns proving the content of a writing, not the admissibility of expert opinion to explain trade usage, and a written code does not speak for itself.
Your takeaway: whenever a trade usage or custom is at issue, split the questions—the jury determines what the trade actually does, and the court determines what the written words mean.
- Should the court admit ColdChain's course-of-performance evidence?
Answer: No, because the contract expressly and carefully negated reliance on course of performance, course of dealing, and usage of trade.
When you see a contract dispute with a "complete and exclusive statement" clause plus an express ban on course of performance, course of dealing, or usage of trade, you are testing UCC § 2-202 and the parties' power to define the interpretive rules for their own agreement. That clause matters: the UCC permits parties to "carefully negate" the use of these extrinsic guides.
Here, ColdChain's evidence of accepted non-self-defrosting units would ordinarily be a classic course of performance showing how the parties understood "commercial freezer units." But the contract did not merely say it was final; it expressly and carefully negated reliance on course of performance, course of dealing, and usage of trade. That explicit waiver is enforceable, so the court should exclude the evidence.
The first wrong answer—that the writing bars all extrinsic evidence just because it is a complete and exclusive statement—overstates the rule. A merger clause alone does not necessarily bar all evidence of meaning; the express negation is what defeats this evidence. The answer claiming course of performance is always admissible to explain ambiguity is also wrong: ambiguity may trigger interpretation, but the parties can contractually waive those usual interpretive aids. Finally, the suggestion that parties cannot waive their right to prove actual understanding misunderstands UCC policy; sophisticated parties may contractually limit what evidence the court may consider.
Study tip: on bar questions, look for "complete and exclusive" language plus specific negation of course of performance/dealing/usage—that combination is a deliberate UCC waiver and will exclude the evidence.
- Has Parker's payment conduct established a course of performance?
Answer: No, because Parker's payments were made automatically and without knowledge that the shipments were late or from the wrong warehouse.
When you see a UCC contracts question about course of performance, course of dealing, or usage of trade, remember these are three distinct sources of extrinsic evidence. Course of performance concerns conduct under the current contract, course of dealing concerns prior contracts between the same parties, and usage of trade concerns industry norms. The critical requirement for a course of performance is that the conduct be known and accepted without objection.
Here, Parker's payments were made automatically by its accounts payable department, which never reviewed the shipping dates or points. Because Parker lacked knowledge that Norton was shipping two days late and from the wrong warehouse, its payments cannot constitute knowing acquiescence to those deviations. The correct answer is the one stating that Parker's payments were made automatically and without knowledge of the late or mis-sourced shipments.
Now consider the distractors. The choice claiming payments concerned only price and had nothing to do with deliveries is a trap: payment is a contractual performance, but the flaw here is not the subject matter—it's the absence of knowledge. The choice arguing that repeated, consistent payments without objection establish a course of performance overlooks that mere automation is not "acceptance" or "acquiescence" when the party is unaware of the underlying facts. Finally, the choice that calls these payments a "course of dealing" binding Parker as a merchant conflates two separate doctrines—course of dealing refers to prior contracts, not the current one—and merchant status does not impute knowledge of specific delivery deviations.
Study tip: For any course-of-performance question, always ask did the party actually know about the other side's conduct? If not, no course of performance is formed, no matter how many payments or shipments occur.
- Is Tri-State's course-of-dealing evidence admissible?
Answer: Yes, because a course of dealing may supplement the terms of a writing even if the writing is a complete and exclusive statement of the agreement.
Whenever you see a UCC sale-of-goods contract with an integration clause and evidence of prior dealings, think about UCC § 2-202. Unlike common-law parol evidence, the UCC allows a final writing to be supplemented by course of dealing, course of performance, or usage of trade—even if the writing is a complete and exclusive statement—so long as the evidence does not contradict an express term.
Here, the writing is silent about installation and startup assistance. Tri-State's prior course of dealing shows that Precision always provided that assistance at no extra charge. That evidence does not contradict anything in the writing; it fills a gap. Therefore, it is admissible.
The answer choice saying "yes, but only because the writing is silent" is too narrow: even if the writing had addressed installation, course-of-dealing evidence could still explain an ambiguous term, though it could not flatly contradict a clear one. The choice rejecting admissibility because the writing was "complete and exclusive" misreads the UCC—completeness does not bar course-of-dealing evidence. And the choice limiting course of dealing to "only explain ambiguous terms" is also wrong: the UCC allows it to supplement a writing, not merely clarify ambiguity, so it can supply an omitted consistent term.
Your takeaway: on the bar exam, for sales of goods, integration clauses exclude prior agreements and contradictions, but not course of dealing, course of performance, or usage of trade. Ask whether the evidence contradicts the writing or merely supplements it.
- Who is likely to prevail in Mesa's suit for the price difference?
Answer: Casa, because a UCC modification needs no consideration and the parties' course of performance operated as a waiver of the no-oral-modification clause.
When you see a dispute over an oral change to a written sales contract, immediately think UCC § 2-209. That provision governs modification, waivers, and "no oral modification" clauses, and it breaks from common-law contract rules in two ways you must remember.
Here, the parties' oral agreement to reduce the price to $32 for the second year is enforceable against Mesa. First, under the UCC, a modification needs no consideration; the market slump and the parties' mutual agreement are enough. Second, although the contract contained a no-oral-modification clause, the parties' 11-month course of performance—Mesa invoicing at $32 and Casa paying those invoices—operated as a waiver of that clause. Mesa cannot now retroactively insist on the original price. Therefore Casa prevails.
The wrong answer that says no-oral-modification clauses are unenforceable between merchants misses the point: UCC § 2-209(2) expressly makes such clauses enforceable. The answer claiming Mesa wins for lack of consideration reflects the common-law rule, but the UCC expressly abolishes that requirement for modifications of sales contracts. And the answer that the no-oral-modification clause blocks the oral change ignores the waiver-by-conduct doctrine—Mesa's own invoices were the evidence of the waiver.
Study tip: On bar-exam contracts questions, always ask whether the contract is for goods. If yes, apply UCC § 2-209 and remember: no consideration needed, and a no-oral-modification clause can be waived by a party's conduct.
- Will Atlantic's prior invoicing practice bind GreenMart?
Answer: No, because a course of dealing must be conduct between the parties to the particular transaction, and Atlantic's dealings with other grocers do not bind GreenMart.
Whenever you see a contract term with an ambiguous definition like "standard field box," your first task is to separate two distinct UCC concepts: a course of dealing (conduct between the same parties in prior transactions) and a usage of trade (a practice regularly observed in the industry). Here, Atlantic's invoicing practice with the three chains is a classic course of dealing, but it only exists between Atlantic and those specific chains. Because GreenMart was not a party to those prior transactions, that conduct cannot be used to interpret the new contract with GreenMart. Furthermore, this practice is not a usage of trade—the regional exchange's published 40-pound standard contradicts it, so it is not an industry-wide norm. This is why the correct answer is the one stating that a course of dealing must be conduct between the parties to the particular transaction, and Atlantic's dealings with other grocers do not bind GreenMart.
Now, consider the distractors. The first choice ("embodied in a trade code") is wrong because a usage of trade does not require a written code—it can be established by regular practice, though it still wouldn't apply here. The second choice ("usage of trade binding on all buyers") mislabels Atlantic's private practice as an industry-wide usage, which the facts do not support. The third choice ("GreenMart is a merchant and should have known") conflates merchant status with constructive knowledge of a specific seller's private invoicing habit—merchant status doesn't impose knowledge of a course of dealing between other parties. For the exam, remember the key question: "Are these the same parties?" If the practice involves third parties, it is not a course of dealing binding on the new party.
- Which party's interpretation of 'cone' should the court adopt?
Answer: Tanner's, because Loom accepted Tanner's first three deliveries under the new contract without objection.
When a contract term like "cone" is ambiguous, the UCC tells courts to resolve its meaning by looking at the parties' actual performance first, not at outside standards. This question tests the hierarchy of interpretive evidence: course of performance under the current contract outweighs course of dealing from earlier transactions and usage of trade from the industry.
Here, Tanner's first three deliveries under the new contract used 1.75-pound cones, and Loom's warehouse accepted and used them without objection. That repeated acceptance is a course of performance—it is the parties' own practical construction of the contract while performing it. Because this course of performance is entitled to the greatest weight, the court should adopt Tanner's interpretation.
The choice arguing that the five-year course of dealing deserves more weight gets the hierarchy backwards: the most recent performance under the disputed contract is more persuasive than older dealings. Similarly, the choice relying on industry usage of trade overlooks that usage of trade is subordinate to course of performance when the parties have shown their own meaning through conduct. And the choice claiming the contract is too indefinite is wrong because UCC gap-filling and extrinsic evidence exist precisely to resolve ambiguous terms, not to invalidate them.
So when you see conflicting interpretive clues, remember the priority: express terms, then course of performance, then course of dealing, then usage of trade. Acceptance without objection is usually the strongest signal of meaning.
- In the parties' dispute over the extra 30 feet, is Beacon bound by the trade usage?
Answer: Yes, because a usage of trade of which Beacon should have been aware is relevant, and as a marina operator Beacon should have been aware of it.
Whenever a contract dispute turns on a trade term, your first question under the UCC should be: what did the parties know or should they have known? A usage of trade is defined as a practice so regularly observed in a place or vocation that it justifies an expectation of compliance. Crucially, a party is bound not only by usages it actually knew, but also by usages it should have known. Here, the uniform trade meaning of "50 fathoms of chain" includes the customary 10% allowance for shackles and connecting links. Apex delivered exactly that: 300 feet plus a 30-foot allowance. Because Beacon operates a retail marina and therefore should have been aware of the marine-supply industry's understanding, it is bound by that usage even though it had no actual knowledge of it.
The choice saying Beacon is bound because it should have been aware, as a marina operator, captures the rule perfectly. The choice rejecting liability because Beacon lacked actual knowledge is wrong: the UCC does not require actual knowledge, only constructive knowledge. The choice saying trade usage cannot override a clear dictionary meaning is also wrong — trade usage routinely gives commercially reasonable meaning to terms, even terms with common meanings. Finally, the choice saying the seller's trade usage binds the buyer once shown by expert testimony overstates the rule: expert testimony can prove the usage, but it binds the buyer only if the buyer knew or should have known it, not merely because the seller established it.
Study tip: on bar-exam contract questions, connect trade usage to the "knew or should have known" standard — actual ignorance is not an excuse in a trade you're in.
- Is Suncrest's evidence sufficient to establish a usage of trade?
Answer: No, because Suncrest has not shown that the 20% tolerance is regularly observed by others in the trade.
Whenever you see "usage of trade" on a bar exam, remember that it is an industry-wide practice, not a personal habit. Under the UCC, a usage of trade is a practice or method of dealing so regularly observed in a place, vocation, or trade that it justifies an expectation that it will be followed in the transaction. The key is regular observance by others in the trade.
Suncrest's evidence fails because it never shows that the 20% small-fruit tolerance is regularly observed in the peach industry. Its sales manager testified only about Suncrest's own practice and that two or three other growers "sometimes" do the same. Occasional, limited conduct is not the widespread, regular pattern the law requires. Therefore, the correct answer is that Suncrest has not shown the tolerance is regularly observed by others in the trade.
The other choices miss the point. Saying the stated quantity of 2,000 cartons controls over industry practice is wrong because usage of trade can supplement or explain even definite terms. Suncrest's own consistent practice is also insufficient: one party's repeated conduct may be course of performance, but it does not prove an industry-wide usage. Finally, the fact that the sales manager testified and Metro offered no rebuttal does not help—Suncrest still bears the burden of producing sufficient evidence, and unrebutted testimony that is legally insufficient remains insufficient.
Study tip: distinguish "course of performance" (same parties, prior dealings), "course of dealing" (previous transactions between the parties), and "usage of trade" (the whole industry). Only the last requires regional or trade-wide regularity.
- In Crestline's action for breach, how should the court resolve the dispute?
Answer: The express definition controls, so the brightness-84 delivery is a breach and the conflicting industry usage cannot change that term.
Whenever you see a UCC contracts question involving contract interpretation, immediately think about the hierarchy of evidence. Under UCC § 1-303, express terms prevail over course of performance, which prevails over course of dealing, which prevails over usage of trade. The parol evidence rule allows extrinsic evidence to explain or supplement a contract, but never to contradict an express term.
Here, the fully integrated written contract expressly defines "No. 2 white offset paper" as requiring brightness 86. That express definition is an unambiguous term of the agreement. Under the UCC hierarchy, that express term must control over any conflicting industry usage. Even though the industry uses 84, and even though both parties are merchants, the express definition of 86 wins. Since Summit delivered paper at brightness 84, it breached the contract.
The "usage of trade" choice is a classic trap—it correctly states that merchants are bound by industry usages, but it ignores the UCC's explicit rule that express terms trump trade usages. The "course of performance" choice is similarly flawed; while past acceptance of 86 deliveries is relevant, it actually supports the express term (86) rather than contradicting it, and even if it conflicted, express terms still win. Finally, the "court must first decide ambiguity" choice misstates the law—while courts sometimes consider extrinsic evidence to determine if a term is ambiguous, here the term is expressly defined and unambiguous, so the court can enforce it directly without a threshold ambiguity finding.
Your takeaway: when a contract contains an express definition, stop there. The UCC's hierarchy is your roadmap—express terms are the undisputed king. Watch for answer choices that try to elevate course of dealing or usage of trade above a clear, written term.
- In the parties' dispute over whether the July delivery was timely, who is likely to prevail?
Answer: Roto, because its July 2 notice reasonably retracted the waiver of the delivery date, so the July shipment had to be tendered by the 10th.
Whenever you see a contract with an express deadline and one party repeatedly accepts late performance, think waiver and retraction, not automatic modification. Under the UCC, Roto's acceptance of the January-through-June shipments on the 18th waived Delta's duty to deliver by the 10th for those shipments. But a waiver affecting the future can be retracted by reasonable notice, unless the other party materially changed its position in reliance. Roto's July 2 fax gave clear, timely notice that strict performance would again be required, and Delta had not relied on the prior indulgence to its detriment. So the original delivery term was restored, the July shipment had to arrive by the 10th, and Delta's July 18 tender was late.
The choice saying "the express delivery term governs and a course of performance can never prevail" is too absolute: a course of performance can create a temporary waiver, but after retraction the express term controls. The choice saying Delta "permanently modified" the contract is wrong because waiver is not modification; it is temporary and revocable. And the choice relying on "same day of the month as earlier shipments" ignores that past leniency did not establish a new deadline once Roto reasonably retracted the waiver.
Study tip: distinguish modification—a permanent change requiring agreement—from waiver—a voluntary giving up of a right that can be retracted with notice absent reliance. Bar questions often test that distinction through repeated acceptance of late performance.
